<template>
  <div class='home-category'  @mouseleave="categoryId=null">
    <ul class="menu" >
      <li v-for="item1 in menuList" :key="item1.id" @mouseenter="categoryId=item1.id" :class="{active:categoryId===item1.id}">
        <RouterLink :to="`/`">{{item1.name}}</RouterLink>
        <template v-if="item1.children">
          <RouterLink
            v-for="item2 in item1.children"
            :key="item2.id"
            :to="`/`">
            {{item2.name}}
          </RouterLink>
        </template>
         <span v-else>
          <XTXGuJia width="60px" height="18px" style="margin-right:5px" bg="rgba(255,255,255,0.2)" />
          <XTXGuJia width="50px" height="18px" bg="rgba(255,255,255,0.2)" />
        </span>
      </li>
    </ul>
        <!-- 弹层 -->
     <!-- 弹层 -->
    <div class="layer">
     <h4 v-if="zhidaohang">{{zhidaohang.id==='brand'?'品牌':'分类'}}推荐 <small>根据您的购买或浏览记录推荐</small></h4>
      <ul v-if="zhidaohang && zhidaohang.goods && zhidaohang.goods.length">
        <li v-for="item in zhidaohang.goods" :key="item.id">
          <RouterLink to="/">
            <img :src="item.picture" alt="">
            <div class="info">
              <p class="name ellipsis-2">{{item.name}}</p>
              <p class="desc ellipsis">{{item.desc}}</p>
              <p class="price"><i>¥</i>{{item.price}}</p>
            </div>
          </RouterLink>
        </li>
      </ul>
      <!-- 品牌弹出层 -->
       <ul v-if="zhidaohang && zhidaohang.brands && zhidaohang.brands.length">
         <li class="brand" v-for="item in zhidaohang.brands" :key="item.id">
           <RouterLink to="/">
             <img :src="item.picture" alt="">
             <div class="info">
               <p class="place"><i class="iconfont icon-dingwei"></i>{{item.place}}</p>
               <p class="name ellipsis">{{item.name}}</p>
               <p class="desc ellipsis-2">{{item.desc}}</p>
             </div>
           </RouterLink>
         </li>
       </ul>
    </div>
  </div>
</template>

<script>
import { useStore } from 'vuex'
import { reactive, computed, ref } from 'vue'
import { pinpaiqinqiu } from '@/Api' // 品牌数据请求
export default {
  name: 'HomeCategory',
  setup () {
    // 需要在组件内部，定义一个品牌数据
    const brand = reactive({
      id: 'brand',
      name: '品牌',
      children: [{ id: 'brand-chilren', name: '品牌推荐' }],
      brands: [] // 添加品牌请求的数据
    })
    const store = useStore()
    const menuList = computed(() => {
      const list = store.state.gouwuche.gouwuche.map(item => {
        return {
          id: item.id,
          name: item.name,
          // 使用 && 符号防止初始化没有children里数据没有的时候，调用slice函数报错
          children: item.children && item.children.slice(0, 2), // 只需要两个二级分类
          goods: item.goods
        }
      })
      list.push(brand)// 手动添加品牌模块
      return list // 添加完成返回
    })
    // 鼠标经过时，弹出层该出现的内容样式
    const categoryId = ref(null)
    const zhidaohang = computed(() => {
      return menuList.value.find(item => item.id === categoryId.value)
    })
    // 品牌模块内容数据请求  尽量不用使用async再setup上
    pinpaiqinqiu().then(data => {
      brand.brands = data.result
    })
    return { menuList, categoryId, zhidaohang }
  }
}
</script>

<style scoped lang='less'>
.home-category {
  width: 250px;
  height: 500px;
  background: rgba(0,0,0,0.8);
  position: absolute;
  left: 0;
  top: 0;
  z-index: 99;
  .menu {
    li {
      padding-left: 40px;
      height: 50px;
      line-height: 50px;
      &:hover,&.active {
        background: @xtxColor;
      }
      a {
        margin-right: 4px;
        color: #fff;
        &:first-child {
          font-size: 16px;
        }
      }
    }
  }
  // 弹出层样式 -隐藏
  .layer {
  width: 990px;
  height: 500px;
  background: rgba(255,255,255,0.8);
  position: absolute;
  left: 250px;
  top: 0;
  display: none;
  padding: 0 15px;
  h4 {
    font-size: 20px;
    font-weight: normal;
    line-height: 80px;
    small {
      font-size: 16px;
      color: #666;
    }
  }
  ul {
    display: flex;
    flex-wrap: wrap;
    li {
      width: 310px;
      height: 120px;
      margin-right: 15px;
      margin-bottom: 15px;
      border: 1px solid #eee;
      border-radius: 4px;
      background: #fff;
      &:nth-child(3n) {
        margin-right: 0;
      }
      a {
        display: flex;
        width: 100%;
        height: 100%;
        align-items: center;
        padding: 10px;
        &:hover {
          background: #e3f9f4;
        }
        img {
            width: 95px;
            height: 95px;
        }
        .info {
          padding-left: 10px;
          line-height: 24px;
          width: 190px;
          .name {
            font-size: 16px;
            color: #666;
          }
          .desc {
            color: #999;
          }
          .price {
            font-size: 22px;
            color: @priceColor;
            i {
              font-size: 16px;
            }
          }
        }
      }
    }
    li.brand {
       height: 180px;
       a {
         align-items: flex-start;
         img {
           width: 120px;
           height: 160px;
         }
         .info {
           p {
             margin-top: 8px;
           }
           .place {
             color: #999;
           }
         }
       }
     }
  }
}
// 弹出层 显示
&:hover {
  .layer {
    display: block;
  }
}
}
// 骨架动画
.xtx-skeleton {
  animation: fade 1s linear infinite alternate;
}
@keyframes fade {
  from {
    opacity: 0.2;
  }
  to {
    opacity: 1;
  }
}
</style>
